Mitochondrial Complex Iii Deficiency Nuclear Type 9 C4015253
A rare genetic condition disrupting cellular energy production through mitochondrial dysfunction. Typically presents in early childhood. Care focuses on symptom management and metabolic support.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Cardiac arrhythmias
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Renal tubulopathy
(renal)Growth retardation
(endocrine)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Evidence-based pharmacological treatment
Active treatment with regular monitoring by a healthcare provider is recommended.
Growth and Development Assessment
Serial anthropometric measurements, bone age assessment, and endocrine evaluation to detect growth failure and address metabolic contributors to poor growth.
High-Calorie Nutritional Intervention
Caloric supplementation strategy using specialized formulas and frequent small meals to meet increased metabolic demands and prevent catabolism.
Additional treatment options
Growth Hormone Therapy Consideration
Evaluation for growth hormone therapy in children with documented growth hormone deficiency and poor linear growth despite optimal nutritional support.
medicationRespiratory Muscle Conditioning
Specific breathing exercises and respiratory muscle training to maintain pulmonary function and prevent complications from respiratory muscle weakness.
physical_therapyEnvironmental Modifications
Home and work/school modifications including accessibility adaptations, temperature regulation, and oxygen availability to reduce metabolic stress and support independence.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Mitochondrial Complex Iii Deficiency Nuclear Type 9 C4015253?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy